I will try not to compare robotics;notes to steins;gate because too much because steins;gate is without the doubt one of the best anime.
First off I'd like to point out that all the characters from robotics;notes are down right terrible, they are generic and boring and you wish they stop talking and making references to gundam that aren't even good.
The only redeeming factor robotics;note has is actually how cool Gunvarrel and Kill-Ballad is, sort of like a sub-plot of the anime but is often over-written by the terrible slow and boring pace of the story.
I'm giving robotics;notes a chance to redeem itself because it's in a way related to steins;gate, the plot is slow and boring as I mentioned earlier.
Having watched up to episode 17, I feel like it was a waste of time watching about 15 episodes; it's true that there are some awesome scenes but the pace of this show will just kill you.
Overall robotics;notes is slow-paced, boring, and is actually predictable to the average skeptic. I can't speak highly of this show because it really is not worth watching, but I will continue to watch it until the end because i'm a fan of steins;gate, and you may also like to give this a chance if you'd seen steins;gate , there will be some great surprises.
After finishing this anime, I can say it's below mediocre and is not worth watching, there were a few good moments, but total disappointing